package org.andengine.opengl.texture.region;

import org.andengine.opengl.texture.ITexture;

/**
 * (c) 2010 Nicolas Gramlich
 * (c) 2011 Zynga Inc.
 *
 * @author Nicolas Gramlich
 * @since 14:29:59 - 08.03.2010
 */
public class TextureRegion extends BaseTextureRegion {
    // ===========================================================
    // Constants
    // ===========================================================

    private static final float SCALE_DEFAULT = 1;

    // ===========================================================
    // Fields
    // ===========================================================
    protected final float mScale;
    protected final boolean mRotated;
    protected float mTextureX;
    protected float mTextureY;
    protected float mTextureWidth;
    protected float mTextureHeight;
    protected float mU;
    protected float mU2;
    protected float mV;
    protected float mV2;

    // ===========================================================
    // Constructors
    // ===========================================================

    public TextureRegion(final ITexture pTexture, final float pTextureX, final float pTextureY, final float pTextureWidth, final float pTextureHeight) {
        this(pTexture, pTextureX, pTextureY, pTextureWidth, pTextureHeight, false);
    }

    public TextureRegion(final ITexture pTexture, final float pTextureX, final float pTextureY, final float pTextureWidth, final float pTextureHeight, final boolean pRotated) {
        this(pTexture, pTextureX, pTextureY, pTextureWidth, pTextureHeight, SCALE_DEFAULT, pRotated);
    }

    public TextureRegion(final ITexture pTexture, final float pTextureX, final float pTextureY, final float pTextureWidth, final float pTextureHeight, final float pScale) {
        this(pTexture, pTextureX, pTextureY, pTextureWidth, pTextureHeight, pScale, false);
    }

    public TextureRegion(final ITexture pTexture, final float pTextureX, final float pTextureY, final float pTextureWidth, final float pTextureHeight, final float pScale, final boolean pRotated) {
        super(pTexture);

        this.mTextureX = pTextureX;
        this.mTextureY = pTextureY;

        this.mRotated = pRotated;
        if (this.mRotated) {
            this.mTextureWidth = pTextureHeight;
            this.mTextureHeight = pTextureWidth;
        } else {
            this.mTextureWidth = pTextureWidth;
            this.mTextureHeight = pTextureHeight;
        }

        this.mScale = pScale;

        this.updateUV();
    }

    @Override
    public TextureRegion deepCopy() {
        if (this.mRotated) {
            return new TextureRegion(this.mTexture, this.mTextureX, this.mTextureY, this.mTextureHeight, this.mTextureWidth, this.mScale, this.mRotated);
        } else {
            return new TextureRegion(this.mTexture, this.mTextureX, this.mTextureY, this.mTextureWidth, this.mTextureHeight, this.mScale, this.mRotated);
        }
    }

    // ===========================================================
    // Getter & Setter
    // ===========================================================

    @Override
    public float getTextureX() {
        return this.mTextureX;
    }

    @Override
    public void setTextureX(final float pTextureX) {
        this.mTextureX = pTextureX;

        this.updateUV();
    }

    @Override
    public float getTextureY() {
        return this.mTextureY;
    }

    @Override
    public void setTextureY(final float pTextureY) {
        this.mTextureY = pTextureY;

        this.updateUV();
    }

    @Override
    public void setTexturePosition(final float pTextureX, final float pTextureY) {
        this.mTextureX = pTextureX;
        this.mTextureY = pTextureY;

        this.updateUV();
    }

    @Override
    public float getWidth() {
        if (this.mRotated) {
            return this.mTextureHeight * this.mScale;
        } else {
            return this.mTextureWidth * this.mScale;
        }
    }

    @Override
    public float getHeight() {
        if (this.mRotated) {
            return this.mTextureWidth * this.mScale;
        } else {
            return this.mTextureHeight * this.mScale;
        }
    }

    @Override
    public void setTextureWidth(final float pTextureWidth) {
        this.mTextureWidth = pTextureWidth;

        this.updateUV();
    }

    @Override
    public void setTextureHeight(final float pTextureHeight) {
        this.mTextureHeight = pTextureHeight;

        this.updateUV();
    }

    @Override
    public void setTextureSize(final float pTextureWidth, final float pTextureHeight) {
        this.mTextureWidth = pTextureWidth;
        this.mTextureHeight = pTextureHeight;

        this.updateUV();
    }

    @Override
    public void set(final float pTextureX, final float pTextureY, final float pTextureWidth, final float pTextureHeight) {
        this.mTextureX = pTextureX;
        this.mTextureY = pTextureY;
        this.mTextureWidth = pTextureWidth;
        this.mTextureHeight = pTextureHeight;

        this.updateUV();
    }

    @Override
    public float getU() {
        return this.mU;
    }

    @Override
    public float getU2() {
        return this.mU2;
    }

    @Override
    public float getV() {
        return this.mV;
    }

    @Override
    public float getV2() {
        return this.mV2;
    }

    @Override
    public boolean isScaled() {
        return this.mScale != SCALE_DEFAULT;
    }

    @Override
    public float getScale() {
        return this.mScale;
    }

    @Override
    public boolean isRotated() {
        return this.mRotated;
    }

    // ===========================================================
    // Methods for/from SuperClass/Interfaces
    // ===========================================================

    // ===========================================================
    // Methods
    // ===========================================================

    public void updateUV() {
        final ITexture texture = this.mTexture;
        final float textureWidth = texture.getWidth();
        final float textureHeight = texture.getHeight();

        final float x = this.getTextureX();
        final float y = this.getTextureY();

        this.mU = x / textureWidth;
        this.mU2 = (x + this.mTextureWidth) / textureWidth;

        this.mV = y / textureHeight;
        this.mV2 = (y + this.mTextureHeight) / textureHeight;

//		this.mU = (x + 0.5f) / textureWidth;
//		this.mU2 = (x + this.mTextureWidth - 0.5f) / textureWidth;
//
//		this.mV = (y + 0.5f) / textureHeight;
//		this.mV2 = (y + this.mTextureHeight - 0.5f) / textureHeight;
    }

    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================
}
